5 days ago · The meaning of DEALING is method of business : manner of conduct. How to use dealing in a sentence. the activity of selling illegal drugs: 2. the activity of buying and selling shares, or a sale…. DEALING definition: Usually dealings. See examples of dealing used in a sentence. Definition of dealing noun in Oxford Advanced American Dictionary. Meaning, pronunciation, picture, example sentences, grammar, usage notes, synonyms and more. [plural] interaction; business activity: commercial dealings. method or manner of conduct in relation to others:[uncountable] a reputation for honest dealing. Whether you’re a teacher or a learner, Vocabulary.com can put you or your class on the path to systematic vocabulary improvement. Dealing definition: Transactions or relations with others, usually in business. dealing: Transactions or relations with others, usually in business.